Tritium= all night pig hunt pin. It is legal (in TX) to hunt pigs after dark (when the big boys roam) and this pin is a great way not to have to fool with an electric light source when doing so.

I've had 2 for a LONG time now and they are still glowing.

Italways catches me off guard whenI pull my bow from the case in the dark and there the pin is staring at you. OR when pulling the bow up to the treestand in the early morning dark and you look down to see it glowing.

I'd stay with only one 20 pin though, I can't see shooting much past that in the dark.